linux-kernel - Re: [PATCH v2 4/4] iio: light: noa1305: Make use of the helper function dev_err

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Date:   Thu, 7 Oct 2021 18:38:26 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Cai Huoqing <caihuoqing@...du.com>
Cc:     Kevin Tsai <ktsai@...ellamicro.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] iio: light: noa1305: Make use of the helper
 function dev_err_probe()

On Tue, 28 Sep 2021 09:41:55 +0800
Cai Huoqing <caihuoqing@...du.com> wrote:

> When possible use dev_err_probe help to properly deal with the
> PROBE_DEFER error, the benefit is that DEFER issue will be logged
> in the devices_deferred debugfs file.
> Using dev_err_probe() can reduce code size, and the error value
> gets printed.
> 
> Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
Applied this patch to the togreg branch of iio.git and pushed out as
testing for 0-day to try it out.

Note I didn't pick up 1 and 3 from this series and will expect to see
a v3 of those or reply to the relevant reviews.

Thanks,

Jonathan

> ---
> v1->v2: Remove the separate line of PTR_ERR().
> 
>  drivers/iio/light/noa1305.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/iio/light/noa1305.c b/drivers/iio/light/noa1305.c
> index a308fbc2fc7b..71a322227429 100644
> --- a/drivers/iio/light/noa1305.c
> +++ b/drivers/iio/light/noa1305.c
> @@ -217,10 +217,9 @@ static int noa1305_probe(struct i2c_client *client,
>  	priv = iio_priv(indio_dev);
>  
>  	priv->vin_reg = devm_regulator_get(&client->dev, "vin");
> -	if (IS_ERR(priv->vin_reg)) {
> -		dev_err(&client->dev, "get regulator vin failed\n");
> -		return PTR_ERR(priv->vin_reg);
> -	}
> +	if (IS_ERR(priv->vin_reg))
> +		return dev_err_probe(&client->dev, PTR_ERR(priv->vin_reg),
> +				     "get regulator vin failed\n");
>  
>  	ret = regulator_enable(priv->vin_reg);
>  	if (ret) {